Originally Posted by crassius
Maybe I'll try a Stant.
I just took out my second Stant thermostat--the higher quality/priced model even. It was running warmer than others and tended to go warm, e.g., 207, 213, 217 even, and stay
there for a minute or more while the car had cooler water in the lower radiator in the return hose to the water pump. I called it sticking. The consistent sign was I drive a mile of side road and then I get on the interstate: the temp goes from 198 to 205 and stays for a few minutes and then drops to 200.
I put in a Murray $6 stat from OReilly auto parts ( Checkers in parts of the country). It runs at 194-198 instead of 199-207. And it rarely goes to 203 and moves right back down with higher revs or/and car moving through the air.